Separate Speaker Motor Unit for Expanded Back Volume
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Solution Overview
Problem
Portable electronic devices face challenges in reducing size and weight while maintaining sound quality due to the structural limitations of sound output modules, particularly in optimizing the internal space for improved back volume and vibration efficiency.
Innovation Solution
The solution involves separately mounting a speaker unit and a motor unit inside a housing, with the motor unit positioned outside the speaker unit, allowing for a reduced space occupancy and increased actual back volume, which enhances sound quality by effectively utilizing the internal space and integrating a communication hole for volume expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If the speaker unit and motor unit are integrated in a conventional manner, then the structural compactness is maintained, but the actual back volume is reduced and sound quality deteriorates
Solution Approach 1:
The sound output module is divided into separate functional units: a speaker unit with a diaphragm and a motor unit with a vibration body. This segmentation allows each unit to be optimized independently, with the motor unit positioned outside the speaker unit to maximize the actual back volume without compromising structural integrity
Solution Approach 2:
The motor unit is disposed in a different spatial dimension relative to the speaker unit, specifically positioned outside the speaker unit rather than integrated within it. This dimensional repositioning creates additional internal space that communicates with the back volume, effectively increasing the actual back volume available for sound propagation
2Volume of stationary object
If the internal space is expanded to increase back volume, then sound quality is improved, but the size and weight of the device increase
Solution Approach 1:
The motor unit and speaker unit are merged into a single integrated sound output module assembly that is mounted within the housing. This merging allows the motor unit to contribute its internal space to the overall back volume while maintaining a compact external footprint, effectively using existing component volume rather than adding separate space
Solution Approach 2:
The motor unit is positioned such that its internal space is nested within the overall housing structure and communicates with the speaker unit's back volume. This nesting arrangement allows the motor unit's volume to be utilized as part of the acoustic system without increasing the external dimensions of the device
3Volume of moving object
If the motor unit is positioned inside the speaker unit, then the space occupancy is reduced, but the vibration efficiency decreases and sound waves interfere
Solution Approach 1:
The motor unit is extracted from the interior of the speaker unit and repositioned outside it. This extraction eliminates the harmful interference between sound waves generated by the speaker and the vibration body of the motor, while maintaining compact overall dimensions through optimized spatial arrangement
Solution Approach 2:
A communication hole is introduced as an intermediary structure that connects the internal space of the motor unit with the back volume of the speaker unit. This mediator allows acoustic pressure equalization and vibration transmission without direct physical contact between the motor vibration body and speaker components, preventing harmful interference while maintaining vibration efficiency
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration reduces the size and weight of the sound output module while improving sound quality by increasing the back volume and preventing interference between sound waves, leading to more efficient sound propagation and reduced wear on components.
Implementation Method 1
a motor unit comprising a motor configured to communicate with an inner space of the speaker unit to generate a vibration force
Implementation Method 2
a diaphragm configured to vibrate by the vibration force of the motor unit and positioned in the speaker body
Implementation Method 3
A communication hole may be formed in an outer wall of the motor body for the inner space of the speaker unit and the volume space to communicate with each other
Data Source
AI summary
Disclosed is an electronic device including a sound output module. The sound output module includes a sound output housing and a motor unit positioned in an inner space and communicating with an inner space of the speaker unit to generate a vibration force. The motor unit may include a motor body forming a volume space communicating with the inner space of the speaker unit and a vibration body positioned in the motor body to generate a vibration force. A communication hole may be formed in an outer wall of the motor body for the inner space of the speaker unit and the volume space to communicate with each other.